counting characters

Lodovico Giaretta via Digitalmars-d-learn digitalmars-d-learn at puremagic.com
Tue Jul 19 02:57:27 PDT 2016


On Tuesday, 19 July 2016 at 09:42:40 UTC, celavek wrote:
> On Tuesday, 19 July 2016 at 09:41:32 UTC, John wrote:
>> On Tuesday, 19 July 2016 at 09:34:11 UTC, celavek wrote:
>>> Hi,
>>>
>>> I am trying to count characters in a string like:
>>>
>>> const string dna_chain = 
>>> "AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC";
>>> counts['A'] = countchars!(dna_chain, 'A');
>>
>> countchars(dna_chain, "A");
>
> Not working. Same error.

Works for me:

size_t[char] counts;
const string dna_chain = 
"AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC";
counts['A'] = countchars(dna_chain, "A");


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